<table border="1">
  <tr>
    <th width="500px">explain</th>
    <th>title</th>
    <th>content</th>
    <th>doc id</th>
  </tr>
<% explains.each { %>
  <tr>
    <td>${it[0].toHtml()}</td>
    <td>${it[1].title}</td>
    <td>${it[1].content}</td>
    <td>${it[2]}</td>
  </tr>
<% } %>
</table>
